Paul Lo Duca -- Lo Duca returns after spending 2009 out of baseball entirely. He should be as healthy as he's going to get but I'm not sure a full year away at the age of 38 does much good. The Rockies see him as insurance at catcher (check) first base (check) and outfield ( ). Not quite comfortable checking off on that one. It's also known he won't accept a minor league assignment.
List courtesy of Inside The Rockies